Battery shell, battery and electric equipment

Abstract

The utility model discloses a battery shell, a battery and electric equipment, the battery shell comprises a shell, an installation cavity suitable for installing a pole core is formed in the shell, and the surface of the shell is provided with a communication port communicated with the installation cavity; the cover cap is arranged on the outer surface, where the communicating opening is formed, of the shell, the cover cap is suitable for sealing and covering the communicating opening, a liquid injection cavity is formed in the cover cap and communicates with the communicating opening, and a liquid injection hole communicating with the liquid injection cavity is further formed in the surface of the cover cap. According to the battery shell designed by the utility model, the cover cap is arranged outside the shell, and the liquid injection hole is formed in the cover cap, so that the liquid injection times can be reduced, the quantity of electrolyte injected in a single time can be improved, the electrolyte capacity of the battery shell can be improved, the liquid injection pressure can be relieved, and the impact force of the injected electrolyte on the pole core can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and in particular to a battery case, a battery and an electrical device using the same. Background Art

[0002] In the related art, a liquid injection hole is generally formed in the case of a battery for injecting liquid into the interior of the case. In the prior art, the liquid injection hole is arranged at the edge of the pole column, resulting in a limited single liquid injection volume and a limited space for accommodating the electrolyte. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a battery case. The battery case designed according to the utility model is provided with a cap outside the outer shell and the liquid injection hole is located in the cap, which can reduce the number of liquid injections, increase the amount of electrolyte injected each time, improve the electrolyte capacity of the battery case, relieve the liquid injection pressure, and reduce the impact force of the injected electrolyte on the electrode core.

[0004] The utility model also provides a battery having the above battery case.

[0005] The utility model also provides an electrical device using the above battery.

[0006] The battery case according to the utility model includes: an outer shell, an installation cavity adapted to install an electrode core is formed inside the outer shell, and a communication port communicating with the installation cavity is arranged on the surface of the outer shell; a cap, the cap is arranged on the outer surface of the outer shell where the communication port is formed, the cap is adapted to seal the communication port, a liquid injection cavity is formed inside the cap and communicates with the communication port, and a liquid injection hole communicating with the liquid injection cavity is further formed on the surface of the cap.

[0007] The battery case according to the utility model is provided with a cap to provide a liquid injection cavity outside the outer shell, which can increase the electrolyte capacity of the battery case. And a liquid injection hole is formed on the cap to provide a buffer space and a temporary storage space for the injected electrolyte, reduce the number of liquid injections, increase the amount of electrolyte injected each time, relieve the liquid injection pressure, and reduce the impact force of the injected electrolyte on the electrode core, so as to reduce the influence of liquid injection on the orderliness of the electrode core lamination and reduce the phenomena of diaphragm wrinkling or electrode sheet dressing peeling.

[0008] According to some embodiments of the utility model, the cap includes: a cap body, the cap body forms the liquid injection cavity and the liquid injection hole; a sealing component, the sealing component is arranged at the liquid injection hole and is adapted to block the liquid injection hole.

[0009] According to some embodiments of the present utility model, the cap body includes: a top plate; a side plate located on one side of the top plate in the thickness direction and connected to the edge of the top plate, and the top plate and the side plate jointly define the liquid injection cavity; wherein at least one of the liquid injection holes is provided on the side plate.

[0010] According to some embodiments of the present utility model, the outer shell includes: a housing body with at least one end open; a cover plate covering the open end of the housing body, and the cover plate and the housing body jointly define the installation cavity. The cover plate is formed with the communication port, and the cover plate is provided with a pole post and the cap body.

[0011] According to some embodiments of the present utility model, the minimum distance between the surface of the top plate away from the cover plate and the surface of the cover plate where the cap body is provided is h1, and the minimum distance between the end face of the pole post away from the cover plate and the surface of the cover plate where the cap body is provided is h2, and it satisfies: 0 < h1 / h2 < 5.

[0012] According to some embodiments of the present utility model, it satisfies: 0 < h1 / h2 < 1.2.

[0013] According to some embodiments of the present utility model, the surface of the cover plate facing away from the installation cavity is formed with an installation groove, and the communication port is opened on the bottom wall of the installation groove; a flanging is formed on the edge of the side plate facing away from the top plate, and the flanging is adapted to be connected to the bottom wall of the installation groove.

[0014] According to some embodiments of the present utility model, a receiving groove is formed on the surface of the side plate, and the liquid injection hole is opened on the bottom wall of the receiving groove; the sealing assembly includes: a plugging member including a first section and a second section connected in sequence in the axial direction, the second section is received in the liquid injection hole, and the dimension of the first section in the radial direction is larger than the dimension of the second section in the radial direction, so as to form a stopping surface on the surface where the first section and the second section are connected, and the stopping surface is adapted to stop against the bottom wall of the receiving groove.

[0015] According to some embodiments of the present utility model, the sealing assembly further includes: a sealing cap sleeved on the outer periphery of the first section and fixed in the receiving groove.

[0016] According to some embodiments of the present utility model, the sealing cap is welded and fixed to the bottom wall of the receiving groove.

[0017] The battery according to the second aspect embodiment of the present utility model is briefly described below.

[0018] The battery according to the present utility model includes the battery housing described in any one of the above embodiments. Since the battery according to the present utility model is provided with the battery housing of the above embodiment, the battery has better battery life and higher safety.

[0019] The following briefly describes an electrical device according to an embodiment of the third aspect of the present utility model.

[0020] The electrical device according to the present utility model includes the battery described in the above embodiment. Since the electrical device according to the present utility model is provided with the battery of the above embodiment, the electrical device has higher safety.

[0021] In summary, a cap is provided on the outer side of the battery housing according to the present utility model, and a liquid injection hole is opened on the cap. The external space of the housing can be used to provide a buffer space for the electrolyte, avoiding the direct impact of the electrolyte on the electrode core, relieving the liquid injection pressure, reducing the damage to the electrode core caused by liquid injection. The existence of the liquid injection cavity provides a temporary storage space for the electrolyte before it enters the installation cavity, increasing the amount of electrolyte injected at one time through the liquid injection hole. In this way, the number of liquid injection times can be reduced, simplifying the battery manufacturing process. The liquid injection cavity can be used together with the installation cavity to store the electrolyte, increasing the capacity of the electrolyte in the battery housing to supplement the decomposed part of the electrolyte during the battery cycle, reducing the risk of lithium plating caused by electrolyte dryness, and improving battery safety.

[0022] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0024] Figure 1 is an overall structure diagram of a battery housing according to an embodiment of the present utility model.

[0025] Figure 2 is a structure diagram at the cover plate according to some embodiments of the present utility model.

[0026] Figure 3 is a schematic diagram of the size comparison between the pole column and the cap body according to an embodiment of the present utility model.

[0027] Figure 4 is a structure diagram of the cover plate according to an embodiment of the present utility model.

[0028] Figure 5 is an exploded view of the cap according to some other embodiments of the present utility model.

[0029] Figure 6It is a structural diagram of the cap body according to other embodiments of the present utility model.

[0030] Figure 7 It is a structural diagram of the cap body according to some embodiments of the present utility model.

[0031] Figure 8 is Figure 7 another perspective of the structure in

[0032] Reference numerals:

[0033] 1. Battery housing;

[0034] 10a. Communication port; 11. Housing body; 12. Cover plate; 121. Installation groove;

[0035] 20. Cap; 20a. Liquid injection chamber; 20b. Liquid injection hole;

[0036] 21. Cap body; 211. Top plate; 212. Side plate; 2121. Flange; 2122. Accommodation groove;

[0037] 22. Sealing assembly; 221. Plugging member; 222. Sealing cap;

[0038] 30. Terminal post. Detailed implementation manners

[0039] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In the present utility model, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0044] In the related art, the housing of a battery generally has a liquid injection hole for injecting liquid into the interior of the housing. In the prior art, the liquid injection hole is provided at the edge of the pole column, resulting in a limited single liquid injection volume and a limited space for accommodating the electrolyte.

[0045] Next, refer to Figures 1-8 Describe the battery housing 1 according to an embodiment of the present utility model.

[0046] As Figure 1 、 Figure 2As shown in the figure, the battery housing 1 according to the present utility model includes: an outer shell and a cap 20. An installation cavity suitable for installing a pole core is formed inside the outer shell, and a communication port 10a communicating with the installation cavity is provided on the surface of the outer shell; the cap 20 is arranged on the outer surface of the outer shell where the communication port 10a is formed. The cap 20 is suitable for covering the communication port 10a. An injection cavity 20a is formed inside the cap 20 and communicates with the communication port 10a. A liquid injection hole 20b communicating with the injection cavity 20a is also provided on the surface of the cap 20. Specifically, the battery housing 1 has an outer shell and a cap 20. The installation cavity formed by the outer shell communicates with the injection cavity 20a formed by the cap 20. And the installation cavity of the outer shell is suitable for installing a pole core. After the electrolyte is injected into the injection cavity 20a through the liquid injection hole 20b on the cap 20, it flows into the installation cavity. The liquid injection operation of the battery can be realized through the liquid injection hole 20b on the cap 20.

[0047] Here, the cap 20 is arranged on the outer side surface of the outer shell, and the external space of the outer shell can be utilized to provide a buffer space for the electrolyte, avoiding the direct impact of the electrolyte on the pole core, relieving the liquid injection pressure, and reducing the damage to the pole core caused by liquid injection; in addition, the existence of the injection cavity 20a provides a temporary storage space for the electrolyte before it enters the installation cavity, increasing the amount of electrolyte injected at one time by the liquid injection hole 20b. In this way, the number of liquid injection times can be reduced, and the manufacturing process of the battery can be simplified; and, the injection cavity 20a can be used together with the installation cavity to store the electrolyte, increasing the capacity of the electrolyte in the battery housing 1 to supplement the decomposed part of the electrolyte during the battery cycle, reducing the risk of lithium deposition caused by electrolyte dryness, and improving the battery safety.

[0048] The battery housing 1 according to the present utility model is provided with a cap 20 to set an injection cavity 20a outside the outer shell, which can increase the electrolyte capacity of the battery housing 1. And a liquid injection hole 20b is provided on the cap 20 to provide a buffer space and a temporary storage space for the injected electrolyte, reducing the number of liquid injection times, increasing the amount of electrolyte injected at one time, and relieving the liquid injection pressure, reducing the impact force of the injected electrolyte on the pole core, so as to reduce the influence of liquid injection on the orderliness of the pole core lamination and reduce the phenomena of diaphragm wrinkling or pole piece dressing peeling.

[0049] According to some embodiments of the present utility model, as Figure 5 shown, the cap 20 includes a cap body 21 and a sealing component 22. The cap body 21 forms an injection cavity 20a and a liquid injection hole 20b; the sealing component 22 is arranged at the liquid injection hole 20b and is suitable for plugging the liquid injection hole 20b. Specifically, the cap body 21 is covered on the communication port 10a of the outer shell, and the liquid injection hole 20b is located on the cap body 21. After injecting liquid into the injection cavity 20a through the liquid injection hole 20b, in order to avoid liquid leakage of the battery housing 1, the liquid injection hole 20b can be plugged with the sealing component 22 to make the battery housing 1 a closed structure and ensure the safety of battery use.

[0050] According to some embodiments of the present utility model, as Figures 5-8 shown, the cap body 21 includes a top plate 211 and a side plate 212. The side plate 212 is located on one side of the top plate 211 in the thickness direction and is connected to the edge of the top plate 211. The top plate 211 and the side plate 212 jointly define a liquid injection cavity 20a; at least one liquid injection hole 20b is provided on the side plate 212. In some embodiments, the liquid injection hole 20b can be provided on the top plate 211 and / or the side plate 212 to inject liquid into the liquid injection cavity 20a. Here, in order to prevent the electrolyte from directly impacting the electrode core, the liquid injection hole 20b is provided on the side plate 212. When injecting liquid into the liquid injection cavity 20a, the electrolyte can be impacted from the surface of the side plate 212 provided with the liquid injection hole 20b to the opposite surface, realizing the buffering of the impact force of the electrolyte. And after the electrolyte impacts the surface of the side plate 212, it can be dispersed and sputtered in the liquid injection cavity 20a and flow towards the communication port 10a along the extending direction of the side plate 212. Multiple strands of electrolyte flow into the installation cavity from multiple directions to fully infiltrate the electrode core.

[0051] In some embodiments, the liquid injection hole 20b can be configured as one or more arranged on the side plate 212, and the number of the sealing components 22 corresponds to the number of the liquid injection holes 20b.

[0052] In some embodiments, the side plate 212 is configured as a ring, and the cap 20 is in the shape of a round cover.

[0053] In some embodiments, the side plate 212 includes a first side plate, a second side plate, a third side plate, and a fourth side plate. The first side plate, the second side plate, the third side plate, and the fourth side plate are connected to the edge of the same side surface of the top plate 211 in the thickness direction. The first side plate is opposite to the third side plate, the second side plate is opposite to the fourth side plate, and one end of the first side plate is connected to one end of the second side plate, the other end of the second side plate is connected to one end of the third side plate, the other end of the third side plate is connected to one end of the fourth side plate, and the other end of the fourth side plate is connected to the other end of the first side plate. The top plate 211, the first side plate, the second side plate, the third side plate, and the fourth side plate jointly define the liquid injection cavity 20a. At this time, the cap 20 is in the shape of a square cover. The liquid injection hole 20b is configured as at least one and is provided on at least one of the first side plate, the second side plate, the third side plate, and the fourth side plate.

[0054] In some embodiments, the length of the first side plate is greater than the length of the second side plate. As Figures 7-8 shown, the liquid injection hole 20b is located on the first side plate and is located at the front end, the middle end, or the rear end, preferably at both ends. When injecting liquid under negative pressure, the electrolyte enters the cap 20 through the liquid injection hole 20b on the first side plate, impacts the inner wall of the third side plate opposite to the first side plate, and then flows into the electrode core along the inner wall, allowing the electrolyte to quickly penetrate into the electrode core.

[0055] In some embodiments, the electrode core is located within the installation cavity, and the lead-out tab at the end of the electrode core extends out of the installation cavity through the communication port 10a. The cap 20 is disposed at the communication port 10a. At this time, the lead-out tab at the end of the electrode core extends into the liquid injection cavity 20a of the cap 20. When electrolyte is injected through the liquid injection hole 20b, the electrolyte can impact the lead-out tab and enter the interior of the electrode core along the converging curve of the tab and the lead-out tab, delaying the impact force of the electrolyte on the electrode core.

[0056] The presence of the liquid injection cavity 20a reduces the tightness above the electrode core, increases the liquid buffer space on the front / side elevation of the electrode core, enables the electrolyte to penetrate into the interior of the electrode core from the buffer area, reduces the continuous impact force during the liquid injection process, the impact on the stacking orderliness of the electrode core, and reduces the phenomenon of diaphragm wrinkling.

[0057] In some embodiments, the length of the first side plate is greater than the length of the second side plate. As Figures 5-6 shown, the liquid injection hole 20b is located on the second side plate. When negative pressure liquid injection is performed, the electrolyte enters the cap 20 through the liquid injection hole 20b, impacts the fourth side plate through the lead-out tab and the tab, and then flows into the interior of the electrode core along the inner wall of the fourth side plate. Due to the flow splitting effect of the lead-out tab and the tab on the electrolyte, the length of the cap 20 and the inner wall of the fourth side plate both relieve the impact pressure on the electrolyte, greatly reducing the impact of the electrolyte on the electrode core and reducing the phenomenon of diaphragm wrinkling or electrode sheet dressing peeling.

[0058] According to some embodiments of the present invention, as Figure 1 shown, the outer shell includes a housing body 11 and a cover plate 12. At least one end of the housing body 11 is open; the cover plate 12 is covered on the open end of the housing body 11, and the cover plate 12 and the housing body 11 jointly define an installation cavity. As Figure 4 shown, a communication port 10a is formed on the cover plate 12. As Figure 2 shown, a pole column 30 and a cap body 21 are provided on the cover plate 12, and the pole column 30 on the cover plate 12 is adapted to be electrically connected to the electrode core within the installation cavity. In some embodiments, caps 20 are provided at both ends of the housing body 11, that is, electrolyte can be injected at both ends of the battery housing 1. Since electrolyte continuously penetrates at both ends of the electrode core, the infiltration of the electrolyte into the electrode core is more uniform, reducing the possibility of the electrode core not being infiltrated with electrolyte.

[0059] According to some embodiments of the present invention, as Figure 3As shown, the minimum distance between the surface of the top plate 211 away from the cover plate 12 and the surface of the cover plate 12 where the cap body 21 is provided is h1, and the minimum distance between the end face of the terminal post 30 away from the cover plate 12 and the surface of the cover plate 12 where the cap body 21 is provided is h2, and it satisfies: 0 < h1 / h2 < 5. It can be understood that the distance between the surface of the top plate 211 away from the cover plate 12 and the cover plate 12 should not be too large compared with the distance between the end face of the terminal post 30 away from the cover plate 12 and the cover plate 12. If it is too large, it will cause the cap 20 to occupy too much space, resulting in too large dimensions of the end of the housing, that is, h1 / h2 < 5. At the same time, to ensure that the injection cavity 20a has enough space to provide a buffer space and a temporary storage space for the electrolyte, it is necessary to satisfy 0 < h1 / h2. That is to say, 0 < h1 / h2 < 5 can ensure the existence of the injection cavity 20a while avoiding the cap 20 from occupying too much space.

[0060] Here, the distance between the surface of the top plate 211 away from the cover plate 12 and the cover plate 12 and the distance between the end face of the terminal post 30 away from the cover plate 12 and the cover plate 12 can be as close as possible to make full use of the space at the end of the housing. That is to say, it satisfies: 0 < h1 / h2 < 1.2, which can ensure the existence of the injection cavity 20a while making full use of the space at the end of the housing.

[0061] According to some embodiments of the present invention, such as Figures 4-8 As shown, an installation groove 121 is formed on the surface of the cover plate 12 facing away from the installation cavity, and a communication port 10a is opened on the bottom wall of the installation groove 121; a flanging 2121 is formed on the edge of the side plate 212 away from the top plate 211, and the flanging 2121 is adapted to be connected to the bottom wall of the installation groove 121. At this time, the cap 20 is embedded in the installation groove 121 of the cover plate 12. The flanging 2121 can increase the contact area between the cap 20 and the installation groove 121, thereby increasing the area of the fixed connection between the cap 20 and the bottom wall of the installation groove 121, improving the connection stability between the cap 20 and the bottom wall of the installation groove 121, and ensuring the structural stability of the battery housing 1.

[0062] According to some embodiments of the present invention, such as Figure 5As shown, a receiving groove 2122 is formed on the surface of the side plate 212, and a liquid injection hole 20b is formed in the bottom wall of the receiving groove 2122; the sealing assembly 22 includes a plugging member 221, and the plugging member 221 includes a first section and a second section that are sequentially connected in the axial direction. The second section is received in the liquid injection hole 20b, and the size of the first section in the radial direction is larger than the size of the second section in the radial direction, so as to form a stopping surface on the surface where the first section and the second section are connected, and the stopping surface is adapted to abut against the bottom wall of the receiving groove 2122. In some embodiments, the part of the receiving groove 2122 where the liquid injection hole 20b is formed is configured in a stepped shape, the second section of the plugging member 221 is deformable and is in interference fit with the liquid injection hole 20b, and the size of the first section of the plugging member 221 in the radial direction is larger than the size of the second section in the radial direction, so that after the second section is fitted with the liquid injection hole 20b, the stopping surface can abut against the bottom wall of the receiving groove 2122, thereby blocking the liquid injection hole 20b.

[0063] In some embodiments, the material of the plugging member 221 can be rubber such as silicone rubber, neoprene, nitrile rubber, etc., which has a certain elasticity to achieve a better sealing effect.

[0064] According to some embodiments of the present invention, as Figure 5 shown, the sealing assembly 22 further includes a sealing cap 222, and the sealing cap 222 is sleeved on the outer periphery of the first section and fixed in the receiving groove 2122. In some embodiments, the diameter of the sealing cap 222 is the same as the outer diameter of the receiving groove 2122. After the liquid injection is completed, a downward pressure is applied to the top of the plugging member 221, so that the second section of the plugging member 221 is stuck in the liquid injection hole 20b, the first section of the plugging member 221 abuts against the bottom wall of the receiving groove 2122, and the sealing cap 222 is fixed to the bottom wall of the receiving groove 2122 to seal the entire liquid injection hole 20b, further preventing the electrolyte from overflowing from the liquid injection hole 20b.

[0065] That is to say, the second section of the plugging member 221 extends into the liquid injection hole 20b to be in limit fit with the liquid injection hole 20b, and the stopping surface on the first section of the plugging member 221 abuts against the bottom wall of the receiving groove 2122. At this time, the sealing cap 222 is fixedly arranged on the bottom wall of the receiving groove 2122 to fix the first section to the bottom wall of the receiving groove 2122. After the sealing cap 222 fixes the first section to the bottom wall of the receiving groove 2122, the plugging member 221 cannot move, and the sealing of the liquid injection hole 20b can be achieved. At this time, the sealing cap 222 also seals the liquid injection hole 20b. The plugging member 221 and the sealing cap 222 can achieve secondary sealing of the liquid injection hole 20b, improve the sealing effect of the liquid injection hole 20b, and avoid liquid leakage of the battery case 1.

[0066] In some embodiments, the material of the cap 20 is metal such as aluminum, copper, etc., or plastic such as PET, PA, etc. Preferably, the cap 20 is made of aluminum.

[0067] In some embodiments, the sealing cap 222 can be made of rubber with certain elasticity or metal material.

[0068] According to some embodiments of the present invention, the sealing cap 222 is welded and fixed to the bottom wall of the accommodating groove 2122 to enhance the connection stability between the sealing cap 222 and the bottom wall of the accommodating groove 2122, ensure the abutting effect of the sealing cap 222 on the plugging member 221, and the welding and fixing method is simple and reliable, with low cost and easy to implement in manufacturing.

[0069] In some embodiments, the sealing cap 222 is made of metal material and is suitable for being welded and fixed to the bottom wall of the accommodating groove 2122.

[0070] In some embodiments, the welding and fixing method can be any one of laser welding, ultrasonic welding, pulse welding, adhesive bonding, etc.

[0071] The battery according to the present invention will be briefly described below.

[0072] As Figure 1 shown, the battery according to the present invention includes the battery housing 1 described in any one of the above embodiments. Since the battery according to the present invention is provided with the battery housing 1 of the above embodiments, the battery has better battery life and higher safety.

[0073] The electrical device according to the present invention will be briefly described below.

[0074] The electrical device according to the present invention includes the battery described in the above embodiments. Since the electrical device according to the present invention is provided with the battery of the above embodiments, the electrical device has higher safety.

[0075] In summary, the outer side of the battery housing 1 according to the present invention is provided with a cap 20 and a liquid injection hole 20b is formed on the cap 20. The external space of the housing can be utilized to provide a buffer space for the electrolyte, avoid the electrolyte directly impacting the electrode core, relieve the liquid injection pressure, reduce the damage to the electrode core caused by liquid injection. The existence of the liquid injection cavity 20a provides a temporary storage space for the electrolyte before it enters the installation cavity, so that the amount of electrolyte injected at one time through the liquid injection hole 20b can be increased. In this way, the number of liquid injection times can be reduced, the manufacturing process of the battery can be simplified. The liquid injection cavity 20a can be used together with the installation cavity to store the electrolyte, increase the capacity of the electrolyte in the battery housing 1 to supplement the decomposed part of the electrolyte during the battery cycle, reduce the risk of lithium plating caused by electrolyte dryness, and can also improve the battery safety.

[0076] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0077] Although the embodiments of the present utility model have been shown and described above, changes, modifications, substitutions, and variations can be made to the above embodiments.

Claims

1. A battery housing (1), characterized in that: include: A housing, wherein a mounting cavity suitable for mounting a pole core is formed inside the housing, and a communication port (10a) communicating with the mounting cavity is provided on a surface of the housing; A cap (20) is arranged on the outer surface of the shell where the communication port (10a) is formed, and the cap (20) is suitable for sealing the communication port (10a). A liquid injection cavity (20a) is formed inside the cap (20) and is connected to the communication port (10a). A liquid injection hole (20b) connected to the liquid injection cavity (20a) is also formed on the surface of the cap (20).

2. The battery housing (1) according to claim 1, characterized in that The cap (20) comprises: A cap body (21), wherein the cap body (21) is formed with the liquid injection cavity (20a) and the liquid injection hole (20b); A sealing component (22), wherein the sealing component (22) is disposed at the liquid injection hole (20b) and is suitable for blocking the liquid injection hole (20b).

3. The battery housing (1) according to claim 2, characterized in that: The cap body (21) comprises: Top plate (211); a side plate (212), the side plate (212) being located on one side of the top plate (211) in the thickness direction and connected to the edge of the top plate (211), the top plate (211) and the side plate (212) jointly defining the liquid injection cavity (20a); wherein At least one liquid injection hole (20b) is provided on the side plate (212).

4. The battery housing (1) according to claim 3, characterized in that: The housing comprises: A shell body (11), wherein at least one end of the shell body (11) is open; A cover plate (12), the cover plate (12) is arranged on the open end of the shell body (11), the cover plate (12) and the shell body (11) together define the installation cavity, the connecting port (10a) is formed on the cover plate (12), and the pole (30) and the cap body (21) are arranged on the cover plate (12).

5. The battery housing (1) according to claim 4, characterized in that: The minimum distance between the surface of the top plate (211) away from the cover plate (12) and the surface of the cover plate (12) provided with the cap body (21) is h1, and the minimum distance between the end surface of the pole (30) away from the cover plate (12) and the surface of the cover plate (12) provided with the cap body (21) is h2, and the following conditions are satisfied: <h1 / h2<5。 6. The battery housing (1) according to claim 5, characterized in that: Satisfied: 0 <h1 / h2<1.2。 7. The battery housing (1) according to claim 4, characterized in that: A mounting groove (121) is formed on a surface of the cover plate (12) facing away from the mounting cavity, and the bottom wall of the mounting groove (121) is provided with the communicating port (10a); The edge of the side plate (212) facing away from the top plate (211) is formed with a flange (2121), and the flange (2121) is suitable for connecting with the bottom wall of the installation groove (121).

8. The battery housing (1) according to claim 4, characterized in that: A receiving groove (2122) is formed on the surface of the side plate (212), and the bottom wall of the receiving groove (2122) is provided with the injection hole (20b); The sealing assembly (22) comprises: A sealing member (221), the sealing member (221) comprising a first section and a second section connected in sequence in the axial direction, the second section being received in the injection hole (20b), the radial dimension of the first section being larger than the radial dimension of the second section, so as to form a stop surface on the surface where the first section and the second section are connected, the stop surface being suitable for abutting against the bottom wall of the accommodating groove (2122).

9. The battery housing (1) according to claim 8, characterized in that: The sealing assembly (22) further comprises: A sealing cap (222), wherein the sealing cap (222) is sleeved on the outer periphery of the first section and fixed in the receiving groove (2122).

10. The battery housing (1) according to claim 9, characterized in that: The sealing cap (222) is welded and fixed to the bottom wall of the accommodating groove (2122).

11. A battery, characterized in that: The invention comprises a battery housing (1) according to any one of claims 1 to 10.

12. An electrical device, characterized in that: Comprising a battery according to claim 11.

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